Is This Calcium Deficiency??

[Heavily Medicated]

I think this is Calcium deficiency. I was mixing the water from the dehumidifier with tap, about half and half, and think my girls are starving for Calcium. I starting giving extra Cal-Mag and it looks like the new growth is OK. My Cal-Mag contains 4 percent N, and I am leary about using too much N this late into flowering, is this going to be a problem with the N, and what are other options. PH was 6.8 with dry medium just before feeding using Accurate 8. Pro Mix with T5 and cfl side lighting, temps vary from 65 when dark up to 75 - 80 when lit. fan blowing constantly, 2ftx4ftx5ft lighthouse tent with passive intake and 120 cfm inline duct with carbon filter.

 

[namvet25]

If the spots are rust orange color it is cal def.The nitrogen should not be a problem.

 

[Muddy]

No, that's not a calcium deficiency. If it were, it would look like this.

That looks more like potassium. Besides the cal/mag what else are you feeding and at what strength? Also, what is the pH of your soil when wet/moist. For the Accurate 8 to give accurate readings the soil has to be wet. I find the most accurate readings are those taken the day after feeding/watering.

 

[Heavily Medicated]

I am feeding Algoflash flower at about 700 ppm. PH in 6.5, runoff at 6.4. Will check PH again and get back with a moist reading with accurate 8.
PH is 6.6 via accurate 8, I fed Tue, so 2 days after feed.
Today is day 87

 

[JM]

yep.. potassium:
https://www.autoflower.org/f74/self-diagnose-your-plants-basic-deficiencies-list-11.html

 

[Heavily Medicated]

Knowing that I'm not using the best nutrients in the world, at the stage ofgrowth I am in, what ppm should I be feeding. JM, in the post you referenced above you state that feed should be 800 to 3000 ppm. Can you elaborate on this for me or point me in the right direction to learn about what ppm levels are needed at what times. Thanks.

 

[Muddy]

Your pH is fine, so it's not a nutrient lockout situation. It looks like the NPK on those nutes is 4-6-7, which is a good balance for flowering. In full flower I'm usually running between 900 - 950 ppm. I also keep some PK13.14 on hand and use as needed as some strains need a boost in mid to late flowering. At 87 days I would expect your plants to start finishing up soon. I would suggest upping the ppm of your next feed to at least 900.

 

[Heavily Medicated]

Uped my nutes this feeding, was kind of purposly keeping levels at 600 because I didn't know for sure if I was to include or exclude the tap water starting level. Found some info on another site that said to add the two together, hope it was right, because it seemed like alot of nutes. Plants are looking good and are beginning to finish. Checked trichs and about 50-50 clear - cloudy. Leaves should start yellowing any time. I'm hoping for a little more swell before harvest, but their rock hard. Thanks, everybody for helping me with what are basic questions.

 

[Heavily Medicated]

Plants seem to be putting on a little more bud now that I upped the nutes. Might be start of foxtailing since being stressed. Just starting to see some amber trichs, wonder if I should let her foxtail for some added harvest or start giving only Phed water and let thingss finish up. Leaves are all still pretty green so I wonder if she's got more in store for me. I'll get pics tomorrow. Today is day 97.